/Engine/Source/Runtime/Core/Public/Math/UnrealMathUtility.h
Find the intersection of a line and a plane. Assumes that the line and plane do indeed intersect; you must make sure they're not parallel before calling.
The point of intersection between the line and the plane.
template<typename FReal> static [UE::Math::TVector](API\Runtime\Core\Math\TVector)< FReal > LinePlaneIntersection ( const [UE::Math::TVector](API\Runtime\Core\Math\TVector)< FReal > & Point1, const [UE::Math::TVector](API\Runtime\Core\Math\TVector)< FReal > & Point2, const [UE::Math::TPlane](API\Runtime\Core\Math\TPlane)< FReal > & Plane )